package com.wsx.config;

import com.wsx.common.JacksonObjectMapper;
import com.wsx.interceptor.LoginInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.List;


@Slf4j
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
    /**
     * 设置静态资源映射访问路径为"pathPatterns==/xxx/xxx",可以用通配符**
     * 设置映射的静态资源路径到哪个目录下"classpath:/xxx"
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    @Autowired
    private LoginInterceptor loginInterceptor;

    /**
     *  注册拦截器
     *      /*匹配所有上下文路径下的第一层目录，/**表示匹配上下文路径下的任意目录
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(loginInterceptor)
                .addPathPatterns("/**") //所有路径都被拦截
                .excludePathPatterns(    //添加不拦截路径
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/sendMsg",
                "/user/login");
    }

    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }


}